# Source: `components/velin-collapse.js` ## Accessibility WCAG contract status: **pass** (framework target: AAA). - **Roles:** `button` - **Keyboard:** Enter/Space on trigger ## Attributes | Attribute | Notes | | --- | --- | | `open` | Observed — triggers `attributeChangedCallback` when changed | ## Events - `velin-close` (bubbles) - `velin-open` (bubbles) ## CSS parts - `content` ## Slots - `(default)` - `trigger` ## Public API | Kind | Name | | --- | --- | | Method | `close()` | | Method | `open()` | | Method | `toggle()` |